Configuring a multiport ARP entry
![[NOTE: ]](images/note.png) | NOTE: For multiport ARP entries to be effective for packet forwarding, make sure a service loopback group is created to support the multiport ARP service. The service loopback group has a minimum of one member port. For information about creating and configuring a service loopback group, see Layer 2—LAN Switching Configuration Guide. | |
A multiport ARP entry contains an IP address, MAC address, and VLAN ID.
To make the multiport ARP entry effective for packet forwarding, you must configure a multicast or multiport unicast MAC address entry to specify multiple output interfaces. The MAC address entry must have the same MAC address and VLAN ID as the multiport ARP entry. In addition, the IP address in the multiport ARP entry must reside on the same subnet as the VLAN interface of the specified VLAN.
A multiport ARP entry can overwrite a dynamic, short static or long static ARP entry. Conversely, a short static or long static ARP entry can overwrite a multiport ARP entry.
To configure a multiport ARP entry:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Configure a multicast or multiport unicast MAC address entry. |
| By default, no multicast or multiport unicast MAC address entries exist. For more information about the mac-address multiport command, see Layer 2—LAN Switching Command Reference. For more information about the mac-address multicast command, see IP Multicast Command Reference. |
3. Configure a multiport ARP entry. | arp multiport ip-address mac-address vlan-id | By default, no multiport ARP entries exist. |